Various datasets mapped onto the southern hemisphere of the comet. From top: modulus of torque efficiency (|τ|), a geometric factor as described in the text; gravitational slope, i.e. the angle between facet normal and local gravity vector; total integrated insolation; and peak insolation. The three white lines indicate the direction of the −r, −t, and −n vectors, averaged over one rotation period at perihelion, i.e. the time-averaged directions towards the Sun, ‘backwards’, and ‘down’ in the orbital frame of the comet.